How does the feng shui sewer of the house return to the water?

From the perspective of geomantic omen, sewage backflow is definitely not good. Why not say it, because it has nothing to do with solving the problem!

The sewer returns, depending on which floor you live on. Is there a basement?

There are several situations:

First, the horizontal pipeline has an inverted slope phenomenon, which leads to poor drainage and backwater when the displacement upstairs increases;

Second, the riser is partially blocked, especially the cast iron drainage pipe is more likely to be blocked;

Three, riser and horizontal pipe corner blockage or caused by too much sediment;

Four, there is no basement of the buried part of the discharge pipeline caused by local subsidence or pipeline collapse;

Five, the inspection well has not been unblocked for a long time, and the outdoor pipeline is not smooth;

According to the above analysis, find yourself or find a professional. You can also find property management.